Rock-drilling machine.



L WEST.

ROCK DRLLING MACHINE.

Hummm 1 ILGD APE.1,1909.

Paented; Mal". Q9, E93@ 2 SHEETS-SHEET 1.

www

QH.. y, C md (ltj'ieiuliiig web 11 extending the whole length thereof and projectingsome distance iu the rear, the said web having side [langes 12. T he feed mechanism S comprises a shell, as 13, which is constructed at its sides with overl'ianging flanges 14, the latter tittingl over the flanges 12. rl`he web 11 is also provided with a depending threaded lug. as 15, which fit-s into the channel of the shell 155 and through which is threaded the feed screw 1G. The latter' has at its ends trumiions, as li' and 18, the trunnion 17 being journaled in the removable forward end wall 19 of the shell 13 and the trunnion 18 being journaled'in a transverse web, as 20, which is located in the rearward portion of the shell. rlhe trunnion 18 projects beyond the web 20 and carries a crown, or bevel gear, as 21, which is in mesh with a bevel gear 22. The latter is carried upon a transverse shaft 23, the end portions of which project beyond the shell 13 and are squared, as at 24, to receive a suitable crank handle (not shown) b v means of which the feed screw 1G may be turned and the machine moved axially in a forward or rearward direction.

The rearwardly projecting pcirtion of the web 11a serves as the support for the prime mover, 4.-, which may be o any suitable type but is )refer-ably an electric motor, the details ofI which are not relevant to the subject matter of the present invention. The motor Ll is'finclosed in a housing 26 and its shaft, as projects forwardly beyond the'housing und carries a spur wheel pinion, as 28. The

pinion 28 forms an element of' a. train for driving the plunger reciprocating mechanism, the other element of the train comprising a spur wheel pinion29, which is in mesh with and driven by the pinion 28. rThe ratio between the pinions 28 and 29 is preferably 1:3.

The plunger reciprocating mechanism is mounted in a casing, as 30, having a removable forward head, as 31, and mounted upon the upper side of the casing 11. Vtithin the casing '50 is a rotatable cylindrical member, as 32, which is carried upon a longitudinal shaft, as 3?). The shaft 23 takes its bearings in the end heads of the casing 30 and projects at each end beyond said end heads, the pinion 2S) being mounted upon the rearwardly projecting end portion of the shaft 253, while upon the forwardly projecting end portion of said shaft is mounted a pinion, as B4, which forms an element of the transmission'train l0. A hand wheel, as 35, is also `mounted upon the forwardly projecting portion of the shaft 33 and is provided in orderA that the parts may be operated manua'lly under certain conditions. The cylindrical member 52 is constructed with a spiral V-cam groove, as 36, in which is received the end ofa pin, as 37, which projects from the upper-.side of the plunger 5. The pm 37 has a reduced end portion upon which is rotatably niojnted a hardened steel collar, as 3H, which serves as an anti-friction device and `has contact with the side lfaces of the cam groove 3o.

'l`he `plunger ,5 is preferably of square or rectangular scross sectiom, as shown 'more particularly in Fig. it andthe casing 11 has its central bore constructed for a portion of its length also of square or rectangular cross section inorder that the plunger 5 may have a conformable bearing therein. The casing 11 is constructed in its upper side with an opening, as 3U, into which is set a removable bearing block at() which is illustrated morev particularly in ["ig. T and is of general. wedge shape. having a curved upper face, as 41, which is ilnsh with the curved upper side of the casing 11 and which lits conform- 4ably against the side lipsl or flanges 530 by means of which the casing V0 is attached to the casing 1l, as shown 1n Fig. 3.

'lhe block el() bears against the upper side' of the plunger 5 and is provided with a` longitudinal slot, as 42, through which the pin 3T projects, the said pin also projecting through a longitudinal slot, as 13, which is formed in the under side ofthe casing 30,

The piston as above stated, is driven b v the' plunger 5 but is yieldably related thereto, the piston thus having a certain degree of axial play. rlhe plunger 5 is provided with t central opening through which the piston 6 extends and is slidable. Forwardly of said plunger, the piston is provided with a collar, sel, and rearwardly of said plunger with a removable cap, `as 45. Between the collar 4.4 and the forward face of the plunger an expansive cpilspring t6 is interposet and a similar spring, as 47, is placed` between the cap Ll5 and the rear face of the pluiiger, the springslt and i7 serving to absorb the shocks incident to the forward and reaiwv'artl impact of the piston-due to the sudden tcrniination and reversal of the forward and rearward movements of the plunger and toprovide an eliicient resilient connection for transn'iitting the movement of the plunger ineither direction to the piston. 'lhe springs 4G and Ai7 aie preferably seated in recesses, as -tta' and 47 respectively, which are formed in the end faces of' -the jiluuger, as shown'more particularly in Fig. .7. A portion of the piston t3 projects forwardly beyond the end of the casing 11 and carries a removably assembled chuck, as 4S, in which the drilll steel is held. rl`he chuck/t8' is constructed with ay pair ol5 opposed springl jaws, as 4S), which are held in clamping engagement with the shank of the drill steel by a collar, as 5t), which slidably surrounds the jawsI and which in turn is held against displacement by a sel screw, asfit,

the latter being threaded through the collar and engaging one o i: the jaws 15).

.cylindrical member' 32.

pla ne `is had by setting the bar 7 3 at the de-ly rod may also be turned by hand ywhen necessired angle with relation to the post l. A" lateral adjustmentof themachine is had by properly positioning the block 79 with relation to the tongues TT and also by moving the yoke lTtaxially to any desired position upon the'har T23, and finally aV forward and rearward axial adjustmentof the position ot' the. machine is had by n'ianipulating the screw 16.

The malmer ot operation will he readily apparent t'rom the foregoing description. A suitable device` as S3, is provided for startin;l the motor -l and the latter through the medium ol the wheels 28 and 29 rotates the The member 3:2 forms an element ot the plunger reciprocab ing mechanism, the otherelement ot such mechanism comprising the pin 2ST which is engaged in the cam groove 36 and which, by virtue ot' such engagement, is reciprocated when the member is rotated. The member 32 also toi-ms an element of the means for rotating the piston, the other elements yot which comprise the transmission gearing 10 and the piston rotating mechanism 9. Consequently, it. will be seen that the member 252 immediately and positively produces two simultaneous movements of the piston 6, the one being a reciprocatory movement and the other heilig a rotating movement. ,llie reciprocating movement of the plunger 5 transmitted to the piston by resilient connections which comprise the springs lo and 4:7 andthe rotatingI movement ot' the mechanism 9 transmitted to thel piston (i also by resilient connections, which comprise the springs (ist. The spring 46 takes up the impact or shock due to any relative movement ot the piston and the plunger 5 on the forward stroke thereof and the pneumatic cushioning mechanism comprising the cap 45 and the chamber 52 takes up the shock incident to the impact of the sudden rearward movment of the piston. '.lhe piston G is thus etl'ectually cushioned' at every stage ot' its operation and, by virtue ot' this cushioning etl'ect, not only 'is the running of the machine improved, the parts'4 operatingl as uoisclessly and with as littile.xl "iict.ion as possible, but the lite of the drill rod is materially prolo11ged,'since the shock incident to the jamming of the drill rod in a hard seam ot the rock is not. transmitted suddenly or directly to the connected operating parts hut indirectly and through the agency ot the resilient cushioning connections aforesaid. .\t, the same time th'e advantage of a positive drive and vfrom a common driving element ol both the rotating and reciprocating mcchanisn'is is had. rln ease it should be necessary, the 'motor 25 may be stopped and the movement ot the piston in either direction may be ellected by hand, by reason ot the provision ot' the wheel 35. 'lhe drill sary in the nornial direction of its rotation, as in the operation of' changing drill rods, in which it is desirable to position the chuck so that ready access may be had to the screw 5l. This continued movement of the drill rod does not etl'ect any movement of the other parts` ot the machine. The structure also presents the advantageous incidents of compelidionsness, and durability and the parts thereof may be readily set up or dis- ,.mantled and old or Worn parts may be re- `moved and replaced by new parts. This ad- Vvantage is had by reason of the removable relation otf the casings 13 and 11, 2G and 1l, llt) and ll. and 72 and 1l, and ot' the cylinder 52 and 1l. It will be seen that the several cas-ings mentioned may be stripped from the casing ll and that, therefore, the various mechanisms are practically self-contained mnits.

lVords of position, as horizonta vertical,j` upper and under wherever used in the specification are to be understood as used in their relative sense and are not absolute intheir meanings7 such words being simply used to correspond to the arrangement as disclosed in the drawings.

The structure disclosed is to be regarded merely as exemplary of a preferred and advantageous embodiment of the invention, which, in so far as l am aware, is quite broad in its scope and admits of numerous n'ioditications, such as fall within the terms ot' the appended claims.

Having :tally described my invention, I claim:

1. ln a rock drilling machine, in combination, a casing, a reciprocatory piston therein and carrying a drill bar, means for reciprocating the piston and an axially adjust-able air cylinder mounted at the rear end of the casing and receiving and cushioning the rear end otl the piston.

2. In a rock drilling machine, in combination, a casing, a piston disposed in the casing. projecting therebeyond and carrying a drill bar, piston rotating means in the casing and mounted on the piston, the casing having an opening adjacent the rotating means, piston reciprocating means in the casing and also mounted on the piston, the casing also having an opening adjacent the reciprocating means, an exteriorly disposed longitudinal shatt parallel to the piston, means for rotating the shaft, means'on the shaft for operating the piston reciprocating means, the latter including an element which projects through the second opening, and gearing for operating the piston rotating means from the shaft, the gearing including elements which project through the irst opening.

3. In a rock drilling machine, in combination, an elongated casing, a plunger movable 1h10 11101111111@ 11x1- I 111111111115'. 11

111511111' tha-e111, :1 p15-1111 l @M-111111111111311 1111111131111' 1110111111 1111.11 1h@ @115mg :11111 111111:@1 11g 111151111111 1511111111' 11'111111111115111 111111111111111n 11 1111511111' 111111111 111@ 11111111111 11111;! 11113111111", 11, 111111 11111' 0111-111111 1 11%` 111111111111113; 159011011 1111 11h11 111151 1111x1110', 11

n r h by the 1151015 001111611110115 bouwen the 1111111- 11 T111111110111 5 ,ger ,d '111e 111151011 1111111141111# the fo1111o1' 11o- 1 1:1 Second casing 11nd 1111111111); 11 110111111111111 '1111065 11h@ 111010111111111 of 111e 111111111, 11 gear 011111 groove 111 1111111111 1h@y s111111 o1" the ph111- wheel/1,1111 11h@ 1115115011, 111:10, 21151111; having :111 111111' (11 u 11s 11.1111 1'111111lo11S 1111i 1h11 11.111111- opnng ajzwent the 1111111111111 111111 1111111@Y j 111-1711111 111111111191? which pyojoct 1hzo11ggh the 'also :111 opening adjacent tho gom: 1v1/10111, c1111 hondo, of ibo second. cufing, 11.111111 of 1110 o 11h11 11111111101' 11211111153; 11 s111111 wh `/1 proj-ovm 1' 1111111110115 carrying gen1 Wheel, 11 11101111 through the first opening, 1 51111111111 1111511111 mounted on the F11s1J cawing, 11 111111111111111 .111@11111111' rovohlbly 111011111611 111 1110 5111501111 1 casing, 111111 extending111111111111 1o the pistou,

1111111111 5.511111 Whoe 1119111111113 11111111 1,110 gen1' wheel 1111 1.111@ 01? 111e 111111111111111, 11 thu-c1 cusmg 11101111 ed 1111 the 11115111 0115111111', 111111 gen1-11 111 the 1111111 c 11g, (11111/1111 by the geur wheel 1 5 111111 oylindroal 11101111101' 11111111151' a 119111111111111? on 1h11, 111.1111.' 1131111111011 :11111 111 11,1111 11111111111' 1111111 groove, tho 11111111 of the phmgor cngag the gen1.' 111111111 5111 'the piston.

111g 111 131111 groove, 111111 11 gom' 1, 11111 operad 1' 13. '1'11 11 rook c1 '1111125' 1111111111119, 111 001111111111-- by 111e @111111111111111 111o111bo1' 1111 1 11101111111@v 11` 1111111, 11 011111151', 11191411111100111013/ 13151011 1110111111 gen1 111111111 which projods 111111115111 11111 11111111- 1 111111 @111-1111111 11 111111 hay, 1111.111115 for 11111111111 11111 1111 1 111csh1s 111111 ,1: 11531111111' 111111111, 1.11 the 1'1111 @.1111 o'i-ho owing, 11 Cup shaped 11. `1,1111 rock 1111ling-1111111111111, 1'11 1111111111111-- 11151011 cushioning 111111111101 threaded 111 11h@ 1f111,1111o1o11g111111'1 11111111111, 11 Y z; 1I 11111111111@ S 0011111' 1111: 1111j11s1111o111 11111111151 thereof, 111111 1111111115' 111011111, :1 1111111111 111.1111 111111111111 11X`1 l1:1111 1111111 provdod 011 the @11p shaped 11111111- ,.j, 111111 1.11 1h11 11.111115 111111 1 11'oje131111g 11111111111 the 1101 11'1- o nge 111e 111Go o1. (he 01111111' 111111 111111( 1111\\111'11 111111 1111111101` 11 111111 11111- 111117111111 11V 1,111l c1111 s, 11139611 111111111111 algaint 150111111011.

11h11 1111111111, Co1111oo11o11s between 1.111: 11111111511' i In Lof 11111o11y 1111111111111 have hereunto S01;

111111 the 111.310,11 whereby 111e 101111111.' 1111111111115 1 111.1' 11111111 ,111 presence of two subscribing w11;-

11111 111111'111111111t of 1h@ 11111111, 11 gen1 1111111111 1111 i 111155651 l 1 1h@ 11511111 the :11511111111111'111111111 011.11111111111111- 'LEE WEST. l. It` m xv tu 311011111; tho phmger 111111 having also 1111 @pmb g 1111311111111 111111 gom' 1111111111, "1,1111 111111115111' 111g stom 111111611 1110111015 through '1hV W1 mossos:

11E A 111 11s E. PAUL, 1111114 if. 11 .1111. 

